Method and apparatus for detecting hydrocarbons with NMR...

Details Method and apparatus for detecting hydrocarbons with NMR... Method and apparatus for detecting hydrocarbons with NMR...

2007-02-13

2007-02-13

Shrivastav, Brij B. (Department: 2859)

Electricity: measuring and testing

Particle precession resonance

Using well logging device

C324S300000

Reexamination Certificate

active

11029811

ABSTRACT:
A method and system for estimating native hydrocarbons from oil-based drilling muds with the aid of NMR data. Adaptive echo stacking may be used to balance between precision and sensitivity to changes in the fluid composition. Apparent T2decay time and effective diffusion constants derived from the NMR data may be transformed into an indication of native hydrocarbon type, using known diffusion constants, fuzzy logic, and neural networks.

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International Search Report PCT/US05/00162 dated Nov. 9, 2005.

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